face-to-back variation
正反面色差（染色疵点）
Corrected for both chromatic and spherical aberration, as a lens.
复消色差的矫正色相差和球面像差的，如镜头
(optics) corrected for both chromatic and spherical aberration.
（光学）校正以没有色差和球面差。
I use the strong contrast of the color to romance the picture and extrude the subject.
以反差强烈的色彩渲染画面，突出主题。
Temporary thread should contrast slightly in color with the fabric.
临时针迹的缝线颜色应与面料的颜色稍有反差。
He used to play the roles of bad eggs but this time a good egg.
他以前一般都扮演反面角色，这次却演了一个正面角色。
The contrast of the Black niello against the Bright surface produces an attractive decorative effect.
黑色镶嵌与明亮表面的反差产生富有魅力的装饰效果。
Black and green in one shorts, good look and good for styling!!
黑色与绿色的配色很好看,反差很大!!
Unless colors have been printed onto the surface, plain weave fabrics are generally considered to be reversible.
如果织物没有染色,一般认为平纹织物的正反面是相同的。
Another popular type of towel fabric is jacquard, which has a reversible design woven in.
还有一种做浴巾很受欢迎的面料是织成正反面图案颜色相反的提花布。
In close register, the colour areas meet precisely. It also means the exact adjustment of pages back to back in printing the second dide of a sheet.
精密套准则表示各个颜色范围要准确的相接触。亦指在印书版的反面时，把书页和正面位置对正。
Of course, finishes and coloring methods may make one side the face and prevent reversing the fabric.
当然,通过对织物的整理和纱线的配色可以产生织物的正面,这就防止了正反面的混淆。
reciprocity (law) failure
倒数﹝定律﹞失效﹝指感光体在过短或过长时间感应时产生的感光不足、偏色及不正常反差效果﹞
Lith film: A high contrast orthograph used in graphic reproduction.
特硬菲林（里斯型菲林）:极高反差的正色菲林。适合摄制线条稿或复片等用途。
Some skin disease auto-diagnosis can be realized, comparing the reflecting spectrum and chromatic aberration of malignant skin with those of healthy skin.
通过比较病变皮肤与正常皮肤的反射光谱和色差 ,实现某些皮肤病的分析和诊断。
Apochromatic lens: Compound lens corrected for chromatic aberration, i.e. the three primary colours, red, green and blue are corrected. Also called Apochromat.
复消色差透镜:矫正色差的复合式透镜：即是红、绿和蓝三原色的色差都已矫正。
Positive feedback gives a woman incentive to dress up, which in turn can help keep romance alive.
正面的反馈能激励女人去修饰自己。这反过来，有助于继续保持夫妻间的浪漫色彩。
That’s positive audible feedback.
那就是正面听觉反馈。